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Newark Basin – View from the 21St Century

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Newark Basin – View from the 21St Century Newark Basin – View from the 21st Century Field Guide and Proceedings Edited by Alexander E. Gates Rutgers University-Newark Geological Association of New Jersey XXII Annual Meeting October 7-8, 2005 The College of New Jersey Trenton, New Jersey 2005 GANJ Field Guide Newark Basin – View from the 21st Century Field Guide and Proceedings Edited by Alexander E. Gates Rutgers University-Newark Twenty-Second Annual Meeting Geological Association of New Jersey October 7-8, 2005 The College of New Jersey Trenton, New Jersey 1 2005 GANJ Field Guide CORPORATE SPONSORS OF THE MEETING 2 2005 GANJ Field Guide CORPORATE SPONSORS OF THE MEETING 3 2005 GANJ Field Guide GEOLOGICAL ASSOCIATION OF NEW JERSEY 2005 Executive Board President Dr. William Montgomery, New Jersey City University Past President Dr. Michael J. Hozik, Richard Stockton College of New Jersey President Elect Dr. Alexander E. Gates, Rutgers University-Newark Recording Secretary Mr. Steve Urbanik, New Jersey Dept. of Environmental Protection Membership Secretary Ms. Suzanne Macaoay, Sadat Associates Inc. Treasurer Dr. Alan Benimoff, College of Staten Island/CUNY Councilor at Large Dr. John Puffer, Rutgers University-Newark Councilor at Large Dr. George Randall, Rowan University Councilor at Large Mr. Michael Fedosh, Ecol Sciences, Inc. Director of Dr. Richard Kroll, Kean University Publications Webmaster Dr. Gregory Herman, New Jersey Geological Survey 4 2005 GANJ Field Guide GEOLOGICAL ASSOCIATION OF NEW JERSEY Field Guide and Proceedings of Annual Meetings Guidebooks may be purchased from: Dr. Richard Kroll Department of Geology and Meteorology Kean University Union, NJ 07083 E-mail: [email protected] Guidebooks are $20.00 each; postpaid Checks or money orders must be made payable to GANJ. 2004 GANJ XXI NEOPROTEROZOIC, PALEOZOIC, AND MESOZOIC INTRUSIVE ROCKS OF NORTHERN NEW JERSEY AND SOUTHEASTERN NEW YORK. Puffer, J. and Volkert, R.A. 2003 GANJ XX PERIGLACIAL FEATURES OF SOUTHERN NEW JERSEYAND ADJACENT AREAS, Hozik, M.J. and Mihalasky, M.J., eds. 2002 GANJ XIX GEOLOGY OF THE DELAWARE WATER GAP AREA, Dana D’Amato, ed. 2001 GANJ XVIIIGEOLOGY IN THE SERVICE OF PUBLIC HEALTH, LaCombe, P. and Herman, G., eds. 2000 GANJ XVII GLACIAL GEOLOGY OF NEW JERSEY, Harper, D.P. and Goldstein, F.R., eds. 1999 GANJ XVI NEW JERSEY BEACHES AND COASTAL PROCESSES FROM A GEOLOGICAL AND ENVIRONMENTAL PERSPECTIVE, Puffer, J.H., ed. 1998 GANJ XV ECONOMIC GEOLOGY OF CENTRAL NEW JERSEY, Puffer, J.H., ed. 1997 GANJ XIV ECONOMIC GEOLOGY OF NORTHERN NEW JERSEY, Benimoff, A.I. and Puffer, J.H., eds. 1996 GANJ XIII KARST GEOLOGY OF NEW JERSEY AND VICINITY, Dalton, R.F. and Brown, J.O., eds. 1995 GANJ XII CONTRIBUTIONS TO THE PALEONTOLOGY OF NEW JERSEY, Baker, J., ed. 1994 GANJ XI GEOLOGY OF STATEN ISLAND, Benimoff, A.I., ed. 1993 GANJ X GEOLOGIC TRAVERSE ACROSS THE PRECAMBRIAN ROCKS OF THE NEW JERSEY HIGHLANDS, Puffer, J.H., ed. 1992 GANJ IX ENVIRONMENTAL GEOLOGY OF THE RARITAN RIVER BASIN, Ashley, G.M. and Halsey, S.D., eds. 5 2005 GANJ Field Guide 1991 GANJ VIII EVOLUTION AND ASSEMBLY OF THE PENNSYLVANIA- DELAWARE PIEDMONT, Crawford, M.L. and Crawford, W.A., eds. 1990 GANJ VII ASPECTS OF GROUNDWATER IN NEW JERSEY, Brown, J.O. and Kroll, R.L., eds. 1989 GANJ VI PALEOZOIC GEOLOGY OF THE KITTATINNY VALLEY AND SOUTHWEST HIGHLANDS AREA, NEW JERSEY, Grossman, I.G., ed. 1988 GANJ V GEOLOGY OF THE CENTRAL NEWARK BASIN, Husch, J.M. and Hozik, M.J., eds. 1987 GANJ IV PALEONTOLOGY AND STRATIGRAPHY OF THE LOWER PALEOZOIC DEPOSITS OF THE DELAWARE WATER GAP AREA, Gallagher, W.B., ed. 1986 GANJ III GEOLOGY OF THE NEW JERSEY HIGHLANDS AND RADON IN NEW JERSEY, Husch, J.M. and Goldstein, F.R., eds. 1985 GANJ II GEOLOGICAL INVESTIGATION OF THE COASTAL PLAIN OF SOUTHERN NEW JERSEY, Talkington, R.W. and Epstein, C.M., eds. 1984 GANJ I IGNEOUS ROCKS OF THE NEWARK BASIN: PETROLOGY, MINERALOGY, AND ORE DEPOSITS, Puffer, J.H., ed. 6 2005 GANJ Field Guide ABSTRACTS Control Of Fractured Bedrock Structure On The Movement Of Chlorinated Volatile Organics In Bedrock And Overburden Aquifers, Newark Basin Of New Jersey Robert M. Bond, PG and Katherine E. Linnell, PG Langan Engineering and Environmental Services, Inc., Doylestown, Pennsylvania, USA. We have developed a conceptual model of groundwater flow and contaminant migration in the Passaic Formation and overlying Rahway Till in the Newark Basin of New Jersey as part of a remedial site investigation at a former industrial facility in Middlesex County. Historic releases of chlorinated volatile organic compounds (CVOCs) have caused groundwater contamination in overburden and bedrock that extend up to 4,200 feet downgradient and have affected surface water quality. Our conceptualization of bedrock structure and groundwater flow generally follows the dipping multi-layered leaky aquifer system model. We have mapped out major bedding partings and characterized fracture zones that control the migration of dissolved contaminants in the bedrock aquifer using rock coring, analytical sampling, groundwater elevation data, packer testing, acoustic televiewer logging, and other downhole geophysical techniques. The bedrock in the area of investigation includes the Metlars, Livingston and Kilmer members of the Passaic Formation. The lithology is generally described as red mudstones with intervals of purple mudstone, the latter of which we used as marker beds to correlate boring logs. The study area spans a slope-aquifer system from contaminant source areas located near a topographic high with strong downward hydraulic gradients to a receiving stream at the base of the slope. The discharge area is characterized by flowing artesian conditions in overburden and bedrock wells. We have found that major bedding-parallel water-bearing zones identified in multiple boreholes subcrop below the overburden as buried valleys, having been preferentially eroded because of structural weakness before and during the deposition of the Rahway Till. The geometry of the buried valleys controls the overburden groundwater flow direction, act as pathways for plumes and generally contain the highest concentrations of CVOCs. In recharge areas, the most elevated CVOCs in the overburden groundwater therefore drain, in part, directly into the major bedding-parallel water-bearing zones of the bedrock aquifer. The contaminant distribution in bedrock indicates that the primary direction of groundwater transport from the source areas is along strike, however, significant down-dip transport has been observed. Impacts in bedrock have traveled at least 2,300 feet along strike within the water-bearing zones to the location of a potential near-vertical fracture zone or fault, which is a groundwater discharge zone. This fracture zone feature is expressed as a regional linear valley in the top of bedrock oriented roughly north-south, an orientation consistent with mapped faults in the area. In the current conceptual model, a steeply dipping north-south fracture zone would intercept groundwater flow and be generally protective of aquifer use areas to the west. We continue to investigate this site to complete delineation of the impacts in the bedrock aquifer and assess remedial options. 7 2005 GANJ Field Guide A Beginners Guide to the Geology and Landscapes of the New Jersey Piedmont Dr. Richard L. Kroll Department of Geology and Meteorology, Kean University, Union, New Jersey The New Jersey portion of the Piedmont Province is characterized by a broad lowland to the east that is interrupted by ridges to the west. The lowland is underlain by relatively soft and easily erodable sedimentary rocks of the Newark Supergroup and the ridges are formed of basalts and diabases. Three basalt formations (Orange Mountain, Preakness , Hook Mountain) are interlayered with sedimentary formations (Passaic, Feltville, Towaco, Boonton). The more resistant basalts form the ridges that stretch from near the New York-New Jersey state line, south for approximately 40 miles to the Somerville area. The ridges are known as the First and Second Watchung Mountains, and Hook Mountain. Given their structural tilt to the west and the resulting alternating exposures, the basalts form ridges separated by intervening valleys. The westerly tilt, in combination with columnar structures in the basalts, form ridges with steep easterly edges and gently tilting westerly slopes. A gentle fold causes the ridges to curve to the west and northwest in the Somerville area. Numerous steep sided, NW-SE trending valleys (gorges?) cut through the First Watchung Mountain (Orange Mountain Basalt), and are probably the result of minor fault phenonomena. These cuts provided transportation access routes for the earliest colonists and are still the major east-west access routes. The most prominent diabase body, the Palisades Sill, forms the west shore of the Hudson River. The Palisades are formed by the west tilting columnar structures that provide the dramatic east-facing cliffs.. Smaller diabase bodies, probably southerly extensions of the Palisades Sill, form ridges and hills south of the Somerville area such as Sourland Mountain and Rocky Hill. Interrupting the general north south grain of the topography is the east-west trending Wisconsin Terminal Moraine. In places it is barely noticeable, but in other places it forms a significant topographic feature and is partly responsible for forming the Great Swamp. Other glacial deposits provide a variety of topographic landforms. An exercise in topographic profiling and sketching a geologic cross-section is included. Trace fossils from the
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